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Optimization of machining parameters of EDM while machining Inconel 718 for form tolerance and orientation tolerance

机译:在加工Inconel 718时优化EDM的加工参数以实现形状公差和方向公差

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摘要

This paper demonstrates the effectiveness of optimizing multiple characteristics of electrical discharge machining (EDM) of Inconel 718 using copper electrodes having different shapes via Taguchi method-based Grey analysis. The modified algorithm adopted here is used successfully for both detraining the optimum settings of machining parameters and for combining multiple quality characteristic into one numerical value called Grey relational grade or rank. The essential parameters like peak current, pulse on time and pulse off time are chosen to conduct the experiments on multiple characteristics namely material removal rate (MRR), electrode wear rale (EWR), form tolerance namely straightness and orientation tolerance like perpendicularity and angularity. Then, ANOVA is used to find out the parameter which significantly affects the other parameters. The experimental results have shown that the machining performance on multiple characteristics in the EDM process is improved effectively through this approach.
机译:本文通过基于Taguchi方法的Gray分析论证了使用具有不同形状的铜电极来优化Inconel 718的放电加工(EDM)的多个特性的有效性。此处采用的改进算法已成功用于限制加工参数的最佳设置,以及将多个质量特性组合到一个称为“灰色关联等级”或“等级”的数值中。选择诸如峰值电流,脉冲开启时间和脉冲关闭时间之类的基本参数,以针对多种特性进行实验,这些特性包括材料去除率(MRR),电极磨损规则(EWR),形状公差(即笔直度和方向公差),例如垂直度和角度。然后,使用ANOVA找出对其他参数有重大影响的参数。实验结果表明,通过这种方法可以有效地提高电火花加工工艺中多种特性的加工性能。

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